The Midwest Concrete Pumping worker was cleaning the concrete pump about 6:30 p.m. Thursday when the device suddenly released pressure and propelled him into a sign pole, Chief Deputy Coroner Alfie Ballew said. … Fort Lauderdale, FL — One construction worker was killed and another one was injured Friday afternoon when part of a machine used to pound concrete pilings into the earth fell on them west of Delray Beach, the Palm Beach County Sheriff’s Office said. …